Acer Aspire Z1650 Acer Aspire Z1650 Desktop Service Guide - Page 92

POST Error Indicators When a system error is detected during POST (Power On Self Text), the Setup utility will switch to diagnostic mode and display a POST error message. POST error messages tell users what failure the system has detected. Some error messages could be related to a hardware device. Others may indicate a problem with a device configuration. In some cases an error message may include recommendations for troubleshooting or require that you press the Enter key to display recommendations. Follow the instructions on the screen. It is recommended that you correct the error before proceeding, even if the computer appears to boot successfully. IMPORTANT: If your system fails after you make changes in the Setup menus, reboot the computer, enter Setup again and load Setup defaults to correct the error. Memory Message Gate20 Error Multi-Bit ECC Error Parity Error RAM R/W test failed CMOS Memory Size Wrong Description The BIOS is unable to properly control the mainboard's Gate A20 function, which controls access of memory over 1 MB. This may indicate a problem with the mainboard. This message will only occur on systems using ECC enabled memory modules. ECC memory has the ability to correct single-bit errors that may occur from faulty memory modules. A multiple bit corruption of memory has occurred, and the ECC memory algorithm cannot correct it. This may indicate a defective memory module. Fatal Memory Parity Error. System halts after displaying this message. This message is displayed by the AMIBIOS8 when the RAM read/write test fails. The base memory (memory below 1MB) size that is reported in the CMOS (offset 15h) mismatches with the actual size detected. This condition may occur when the hole is set at 512K base memory or when CMOS is corrupted. Boot Message Boot Failure... Invalid Boot Diskette Drive Not Ready A: Drive Error B: Drive Error Insert BOOT diskette in A: Description This is a generic message indicating the BIOS could not boot from a particular device. This message is usually followed by other information concerning the device. A diskette was found in the drive, but it is not configured as a bootable diskette. The BIOS was unable to access the drive because it indicated it was not ready for data transfer. This is often reported by drives when no media is present. The BIOS attempted to configure the A: drive during POST, but was unable to properly configure the device. This may be due to a bad cable or faulty diskette drive. The BIOS attempted to configure the B: drive during POST, but was unable to properly configure the device. This may be due to a bad cable or faulty diskette drive. The BIOS attempted to boot from the A: drive, but could not find a proper boot diskette. Reboot and Select proper Boot device or Insert Boot Media in selected Boot device BIOS could not find a bootable device in the system and/or removable media drive does not contain media. 84 Aspire Z1650 AIO Computer Service Guide